Publication: Induction of inducible nitric oxide synthase (iNOS) in Porphyromonas gingivalis LPS-treated mouse macrophage cell line (RAW264.7) requires Toll-like receptor 9
Issued Date
2018-09-01
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ISSN
1420908X
10233830
10233830
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2-s2.0-85049578850
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Mahidol University
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SCOPUS
Bibliographic Citation
Inflammation Research. Vol.67, No.9 (2018), 723-726
Suggested Citation
Matsayapan Pudla, Ratchapin Srisatjaluk, Pongsak Utaisincharoen Induction of inducible nitric oxide synthase (iNOS) in Porphyromonas gingivalis LPS-treated mouse macrophage cell line (RAW264.7) requires Toll-like receptor 9. Inflammation Research. Vol.67, No.9 (2018), 723-726. doi:10.1007/s00011-018-1168-1 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/45969
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Title
Induction of inducible nitric oxide synthase (iNOS) in Porphyromonas gingivalis LPS-treated mouse macrophage cell line (RAW264.7) requires Toll-like receptor 9
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Abstract
© 2018, Springer Nature Switzerland AG. Objective: The aim of this study is to investigate the involvement of TLR9 in the regulation of iNOS expression and nitric oxide (NO) production in Porphyromonas gingivalis LPS-treated mouse macrophages. Methods: Mouse macrophage cell line (RAW264.7) was transfected with siRNAs against TLR9 and then stimulated with P. gingivalis LPS. At indicated time points, the activated cells were lysed. Gene and protein expression of iNOS were determined by RT-PCR and immunoblotting, respectively. The level of nitric oxide (NO) production in the supernatant of the activated cells was determined by Griess reaction assay. Results and conclusion: Depletion of TLR9 in mouse macrophages demonstrated the markedly decreased iNOS gene and protein expression by P. gingivalis LPS compared to those of the wild-type or control siRNA transfected cells. In consistent with these results, the level of NO secretion was also significantly diminished in TLR9-depleted cells after challenged with P. gingivalis LPS. These results indicate that TLR9 involves in the regulation of the iNOS expression and the NO secretion in P. gingivalis LPS-treated macrophages.